The most dangerous immediate factor is the sludge's high alkaline level.
然而，这些有毒淤泥中最危险最直接的因素是它的高含碱量。
The oxidized copper ore is low copper grade, complex minerals composition, fine-grained dissemination, high oxidation level, and high content of alkaline gangues.
某铜矿石铜品位低，氧化率高，碱性脉石含量高，嵌布粒度很细，属于典型的难处理氧化铜矿。
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